new graphic card wont pass signal to monitor?

computer medion ms7255new graphic card: gforce 8400 gd 256mb ddr2I have followed instructions on the manual to uninstall original driver and disable the onboard graphics adaptor. After I fit the new graphics card in to the pcie slot and turn the computer back on the pc works and the fan turns but the monitor stays in stanby mode? Am I doing anything wrong? Thank you

The power supply is the hardware that the power cord plug into at the top rear of your case.

There is a label on it with brand, model and ratings at each voltage. You may need to remove the cover to see the label or possibly even remove the four screws holding it into the case. If you need to do that there is no need to disconnect any wires.

The 8400GS is a weak card & not very power hungry. I doubt the power supply is the problem. The card should work immediately after installation & at least display the splash / post screen. The post screen *should* display thru the card regardless of whether the onboard is disabled or not. OtH listed all the possibilities. Could be a blessing in disguise...it's not a very good card & if you got for gaming, you're going to be VERY disappointed.

Nope, changed card at shop for another, and still no joy, same thing... Weird thing is, if i leave the graphics card in the pc but return to plug the monitor into onboard port, still samething, and i can only get my monitor back on if i remove the graphics card?? So it can only be something to do with the card being in the machine.

im pretty sure the power isnt a issue, as ive read a few reviews on the card and its needs aren`t paticularly much, i never bought so much for the gaming reasons, more that the onboard graphics was pretty pants and struggled with basic tasks.As far as the fitting, it fits snug against the casing and is deffinately inserted correctly and no further brackets or anything were required, baffles me, it should be simple like you say... remove old driver, install new card and run driver cd, from what i hear even without the drivers i should still pickup a signal from the new card.One more thing to mention, the monitor has built in speeker, and so it used to connect to the port and then a seperate lead came off of the monitor lead to plug into the onboard sound controller, could this cause any conflicts?

*Edit* Just emailed the manufacturer to see if they have any ideas too

manufacturers email, said it should be a case of setting primary video device to pci-e in bios and saving it, but i cant find any mention of pci-e, checked everywhere including bios, cmos and integrated peripherals setup or something along those lines, if its any help my bios is phoenix award v2.4.

Sammy,Othehill is always hung up on power supply, and for good reason mind you. There are a lot of crappy ones out there. But your new card has hardly any draw, and the problem seems to lie in the bios settings. Looks like you were onto it in your last post. Don't know your bios, but if it's like most, (most are), it's a simple flip of a screen button. Good luck and happy gaming.

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